Liquid Phase Diffusion Coefficient Calculator

Enter value and click on calculate. Result will be displayed.

D_AB = Diffusion Coefficient of Liquid Phase
(Diffusion Coefficient of Solute A in Solvent B)
M_B = Molecular Weight Of Solvent B
Φ = Association Factor of Solvent B
T = Absolute Temperature
μ = Viscosity of Solvent B
V_A = Molal Volume of Solute A

Association Factor of Solvent B:

Molecular Weight Of Solvent B:

Absolute Temperature:

°K

Viscosity of Solvent B:

Molal Volume of Solute A:

Cm³ /g-Mol

Diffusion Coefficient of Liquid Phase:

Cm² / S

What is a Liquid Phase Diffusion Coefficient Calculator?
A liquid phase diffusion coefficient calculator is a tool used to estimate the diffusion coefficient (D) of a solute in a liquid medium. The diffusion coefficient describes how fast a substance (like a dissolved gas, salt, or chemical) spreads through a liquid. It’s essential in understanding mass transfer, reaction rates, and mixing efficiency.

Why use a Liquid Phase Diffusion Coefficient Calculator?

Predicts mixing rates: It helps model how quickly a substance distributes through a liquid.
Optimizes chemical processes: Used in designing reactors, separation units, and filtration systems.
Supports environmental studies: Predicts how pollutants spread in water bodies.
Essential for research: Provides key data for studying reactions and transport phenomena.

How does it work?
Depending on the method, the calculator uses different formulas — one common approach is the Stokes-Einstein equation:

Where:

D = Diffusion coefficient (m²/s)
kB = Boltzmann constant (1.38 × 10⁻²³ J/K)
T = Absolute temperature (K)
η = Dynamic viscosity of the liquid (Pa·s)
r = Radius of the diffusing particle (m)

When do you use it?

In chemical engineering: To design efficient mixing and reaction systems.
In pharmaceuticals: To understand drug dissolution rates.
In environmental science: For modeling pollutant dispersion in water.
In material science: To study the behavior of nanoparticles in liquid media.